Take an IP and try to look for the domain/host associated with it.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Get all possible details about an SSL certificate.
Get all possible details about a domain name.
Convert miles per hour (mph) to kilometers per hour (kph) with ease.
Make sure your passwords are good enough.
Use the Google translator API to generate text to speech audio.